An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the icy planet's surface, to a subterranean lava-flooded mining facility.

Summary List Popular Mods  (0 - 30 of 38)
Swarm Director 2
Alien Swarm

1. Swarm Director 2

1 day ago Released Jul 4, 2014 Single & Co-op Third Person Shooter

Alien Swarm with a twist. Better AI, new mutations, new mapper tools.

Space Swarm Marines
Alien Swarm

2. Space Swarm Marines

12 hours ago Released May 5, 2015 Single, Multiplayer & Co-Op Third Person Shooter

New mod Space Marines for Alien Swarm. :)

Lambda Wars
Alien Swarm

3. Lambda Wars

2 months ago Released Sep 25, 2012 Single & Multiplayer Real Time Strategy

Lambda Wars (formerly Half-Life 2: Wars) brings the struggle between the human resistance and their Combine overlords to a multiplayer real-time strategy...

Black Mesa Swarm
Alien Swarm

4. Black Mesa Swarm

3 weeks ago Released Dec 20, 2013 Single & Multiplayer First Person Shooter

Black Mesa Swarm is an Alien Swarm total conversion remaking Valve Software's award-winning PC game, Half-Life.

Tron Swarm
Alien Swarm

5. Tron Swarm

5 days ago Released Apr 30, 2015 Single, Multiplayer & Co-Op Third Person Shooter

New custom models from Tron Revolution for Alien Swarm.

Alien Swarm: Reactive Drop
Alien Swarm

6. Alien Swarm: Reactive Drop

2 weeks ago Released Apr 9, 2014 Single, Multiplayer & Co-Op Arcade

Adds new PvP game modes, co-op features and singleplayer support into Alien Swarm without changing its concept.

ALIEN SWARM FP
Alien Swarm

7. ALIEN SWARM FP

1 year ago TBD Co-op First Person Shooter

This is a first person view modification of "Alien Swarm"

Alien Swarm:SP
Alien Swarm

8. Alien Swarm:SP

1 year ago Released Feb 26, 2011 Single Player Third Person Shooter

Play the official Alien Swarm maps and any addons through the Offline Practice mode. Alien Swarm:SP also supports a large amount of configurable changes...

ALIENS
Alien Swarm

9. ALIENS

1 year ago TBD Single & Multiplayer Tactical Shooter

A mod for Alien Swarm that is based on the ALIENS movie but for a set of new marines to go and investigate LV426 and see what happened there! (This is...

Occult Scrim
Alien Swarm

10. Occult Scrim

1 week ago Released May 15, 2012 Single & Multiplayer Third Person Shooter

Occult Scrim is real time tactical shooter with chess like awareness and high skill ceiling. The game focuses on intricate game design while offering...

Alien Swarm: Rifle Mod
Alien Swarm

11. Alien Swarm: Rifle Mod

10 months ago Released Jan 1, 2014 Single & Co-op Arcade

Rifle Mod is an Alien Swarm server-only mod that forces players to play with assault rifles only, harder aliens, more ammo, smarter bots. However rifle...

The Survival
Alien Swarm

12. The Survival

1 month ago TBD Single Player First Person Shooter

The Survival is an episodic Source Engine total conversion mod with an original storyline and unique cast of characters. Play your way through a post-apocalyptic...

Omnibus
Alien Swarm

13. Omnibus

4 years ago TBD Single & Multiplayer Arcade

Warhammer 40k mod for Alien Swarm. You play as one of four members in a Space Marine squad and you're sent to a Tyranid infected planet to investigate

SourceForts 2
Alien Swarm

14. SourceForts 2

2 years ago TBD Multiplayer First Person Shooter

Redefine the environment around you. SourceForts 2 is a FPS game designed around building your base and battling against the opposing team in order to...

Vectronic
Alien Swarm

15. Vectronic

4 months ago TBD Single Player Puzzle Compilation

Vectronic is a first-person environmental puzzle mod using Valve's Source Engine. Players must solve puzzles using special power balls that effect boxes...

Modular Combat 2
Alien Swarm

16. Modular Combat 2

3 months ago TBD Multiplayer & Co-op First Person Shooter

Modular Combat 2 is an upcoming role-playing shooter based in the Half-Life universe. The game will feature upgraded graphics with custom shaders, AI...

Optic
Alien Swarm

17. Optic

4 months ago TBD Multiplayer First Person Shooter

Optic is a team-based multiplayer shooter where players can take the role of either a fast-moving runner or a slow-moving hunter.

Alien Swarm Aliens Mod
Alien Swarm

18. Alien Swarm Aliens Mod

4 years ago Released Oct 31, 2010 Single & Multiplayer Tactical Shooter

this "mod" will replace weapon's data and sounds for alien swarm making it feel like Aliens. Furthermore, maps will be made for this mod and the final...

Zombie Swarm.
Alien Swarm

19. Zombie Swarm.

1 year ago TBD Multiplayer Third Person Shooter

Greetings, members of ModDB. My name is Kenny, and I am currently the sole team member of the Zombie Swarm team. I originally started this project in...

B.R.I.S.k.
Alien Swarm

20. B.R.I.S.k.

2 years ago TBD Single Player Arcade

B.R.I.S.k. is a game with unique gameplay developed by a team «Two On The One Box», which has created a modification for the game Portal 2 - Afterword...

IAF Weapon Drop
Alien Swarm

21. IAF Weapon Drop

2 years ago Released Mar 28, 2012 Multiplayer Third Person Shooter

Almost all weapons were modified more or less noticeable. Some of them are big changes (like semi-auto Railguns and Sniper Rifles or Miniguns with lot...

Uprise
Alien Swarm

22. Uprise

2 years ago TBD Multiplayer First Person Shooter

The Resistance have mobilized agaisnt the Combine, causing the streets of City 17 to be turned into a warzone. Fight for the Resistance as a Rebel or...

ASB²  mod
Alien Swarm

23. ASB² mod

2 years ago Released Jul 2, 2012 Multiplayer Tactical Shooter

ASB² mode (alien swarm beyond brutal) is a reborn ASBi game mode emphasizing the higher degree of difficulty, which includes the invalidity of such options...

Alien Swarm Director Mod
Alien Swarm

24. Alien Swarm Director Mod

1 year ago Released Nov 3, 2011 Single Player Third Person Shooter

Welcome to the Alien Swarm Director Mod! ASDM is a single player Alien Swarm mod focusing on increasing replayability by creating a dynamic experience...

Lights
Alien Swarm

25. Lights

2 years ago TBD Single & Multiplayer Cinematic

Once you find the light, nothing can defeat you...

Alien Swarm: The Darkness
Alien Swarm

26. Alien Swarm: The Darkness

4 years ago TBD Single & Multiplayer Tactical Shooter

The Darkness is a mod designed to put the players into a much more difficult position than that of the original Alien Swarm, by removing a lot of lighting...

Lylat's Last Stand
Alien Swarm

27. Lylat's Last Stand

1 year ago TBD Single & Multiplayer Third Person Shooter

SFR (WIP title) is a mod for the Source Engine. It's based on the 3d shooter game Starfox. It will be mostly based on the 1993 nintendo power comics...

Swarm Keeper
Alien Swarm

28. Swarm Keeper

2 years ago Released Jun 3, 2012 Single & Multiplayer Real Time Strategy

Swarm Keeper is a Dungeon Keeper inspired modification for Alien Swarm. It offers the following features: Build a dungeon for your creatures (aliens...

Apocalypse-22
Alien Swarm

29. Apocalypse-22

3 months ago TBD Single, Multiplayer & Co-Op First Person Shooter

Apocalypse cuenta la historia de Abigaíl, una mujer de 28 años de edad en un futuro apocalíptico y sin memorias de su pasado. (Historia en desarrollo)

Alien Frenzy
Alien Swarm

30. Alien Frenzy

4 years ago TBD Multiplayer Real Time Strategy

The year is 2026. The earth has been mostly destroyed by sunflares after the alien invasion. It seems their planet was destroyed first. The aliens came...

Icon
Alien Swarm
Platform
Windows
Developer & Publisher
Valve
Engine
Source
Contact
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Official Page
Alienswarm.com
Release Date
Released Jul 18, 2010
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38
Released
17
Unreleased
21
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Swarm Director 2 (Alien Swarm)
Swarm Director 2 Alien Swarm - Single & Co-op Third Person Shooter
Space Swarm Marines (Alien Swarm)
Space Swarm Marines Alien Swarm - Single, Multiplayer & Co-Op Third Person Shooter
Lambda Wars (Alien Swarm)
Lambda Wars Alien Swarm - Single & Multiplayer Real Time Strategy
Black Mesa Swarm (Alien Swarm)
Black Mesa Swarm Alien Swarm - Single & Multiplayer First Person Shooter
Tron Swarm (Alien Swarm)
Tron Swarm Alien Swarm - Single, Multiplayer & Co-Op Third Person Shooter
Alien Swarm: Reactive Drop (Alien Swarm)
Alien Swarm: Reactive Drop Alien Swarm - Single, Multiplayer & Co-Op Arcade
ALIEN SWARM FP (Alien Swarm)
ALIEN SWARM FP Alien Swarm - Co-op First Person Shooter
Alien Swarm:SP (Alien Swarm)
Alien Swarm:SP Alien Swarm - Single Player Third Person Shooter
ALIENS (Alien Swarm)
ALIENS Alien Swarm - Single & Multiplayer Tactical Shooter
Occult Scrim (Alien Swarm)
Occult Scrim Alien Swarm - Single & Multiplayer Third Person Shooter
Alien Swarm: Rifle Mod (Alien Swarm)
Alien Swarm: Rifle Mod Alien Swarm - Single & Co-op Arcade
The Survival (Alien Swarm)
The Survival Alien Swarm - Single Player First Person Shooter
Omnibus (Alien Swarm)
Omnibus Alien Swarm - Single & Multiplayer Arcade
SourceForts 2 (Alien Swarm)
SourceForts 2 Alien Swarm - Multiplayer First Person Shooter
Vectronic (Alien Swarm)
Vectronic Alien Swarm - Single Player Puzzle Compilation